Erik august bounder



Patented July' l2, |898.

lnu. 607,210.

E. A. BoLlNnEn. SELF GLUSING COCK 0R TAP VALVE. (Application Glad July24, 1897.)

(No Model.)

"Halli vlllllllllllll" Inverllov v ML Mm itil lll.

www 0%# Unire raras r nrnNr @ritiene ERIK AUGUST BOLIN'DER, OFSTOCKHOLM, SIVEDEN.

SELF-CLOSING COCK OR TAP-VALVE.

SPECIFICATION forming part of Letters Patent No. 607,210, dated July 12,1898.

Application filed J'uly 24, 1897. Serial No.645,828. (No model.)Patented in Sweden February 9,1894,No.'5,384; in England March 13, 1894,No. 5,229, and in Denmark Mayl, 1895, No. 1,493.

To all whom it may concern:

Be it known that I, ERIK AUGUST BoLINDnR, a subject of the King ofSweden and Norway, and a resident of 32 Kun gsgatan, in the city ofStockholm, in the Kingdom of Sweden,have invented a new and usefulImprovement in Self-Closing Cocks or Tap-Valves, (for which I haveobtained patents in Sweden, No. 5,384, dated February 9, 1894; inDenmark, N o. 1,493, dated May 3l, 1895, and in England, No. 5,229,dated March 13, 1894,) of which the following is a specification,reference being had to the drawings accompanying and forming a parthereof.

It is well known that the common kind of automatically-closing cocks ortap-valves used in water-pipes or the like cause a violent concussion inthe pipe consequent on the sudden stoppage of the efflux of the motivecolumn-sc., water-hammer.

The object of this invention is to provide an improved cock or tap-valvewhich closes itself automatically, but does not cause any suchconcussion or shock in the' pipes as mentioned above.

The inventionconsists in the construction and combination of deviceshereinafter described and claimed.

In the accompanying drawings, in which similar letters of referenceindicate same or corresponding parts in all the views, Figure 1 shows alongitudinal vertical section of a valve according to this invention,and Figs. 2 and 3 show parts of a somewhat-modified valve also invertical section. Fig. 2 shows the valve Aclosed and Fig. 3 shows itopen.

Referring to Fig. 1 in the drawings, a represents the valve proper,which preferably is in the shape of a hollow cylinder open in one endand in the other provided with a'bottom a. Said valve fits nicely and ismovable on a long piston b, the one end of which is fastened to thevalve-casing. The spout c communicates with that part of thevalve-casing which is in communication with the pipe (or vessel) fromwhich the liquid is drawn through openings CZ in the iiXed end of thesaid piston, around which end is formed a seat for the said valve a.Said seat may consist of a washer e, held in its place by being wedgedwith a shoulder t', (preferably by the expansion of the stem,) whichprevents the stem from moving but a small distance through the bottom a'before it strikes the inside of said bottom, through which it moves soloosely that liquid may easily pass between. The said bottom a is aroundthe stem on the outside provided with a seat 7o for the said auxiliaryvalve 7L.

The workin g of the cock is as follows: When the handle gis pushed in,the stem fwill first move the auxiliary valve h away from its seat, sothat water from the pipe will enter the room between the bottom a andthepiston. b. Upon pushing the handle farther the shoulder 't' will catchagainst the inside of the bottom a and cause the valve a to move awayfrom its seat until the openings CZ in the piston are uncovered, whenthe liquid will pass through said openings to the spout c and run out.When the pushing of the handle ceases, the pressure of the water will atonce close the auxiliary valve 7L, so that water will be inclosed in theroom between the valve-bottom a' and the piston l). The pressure of thewater in the pipe and valve-casing will also tend to close the valve a;but as the inclosed water can only escape aro und the piston the closingof the valve a will not be sudden, but take as long time as the forcingout o the water necessitates. By making the valve fit more or lessclosely on the piston the time for closing the valve will of course becorrespondingly regulated.

Instead of providing the auxiliary valve 7L the stem may be fixed to orin one part with the bottom a', as shown in Figs. 2 and 3. The openingof the valve a will then take more power and require longer time,because the water for filling the room between the bottom ci and thepiston b must be sucked in between the piston and the valve. Tofacilitate the IOO opening, the pushing in of the stem might in thiscase be accomplished by means of some lever mechanis1n.`

The advantage of this construction besides the slow closing is that nopacking around the stern is necessary, as it is plain that there is notendency of the water to pass through where the stem passes through theValvecasing. This valve possesses another advantage-viz., that the valveis not directly in touch with the valve-casing. Hence if the walls ofthe same should for any reason be buckled this will not cause anydisturbance in the proper working of the valve.

Having now described one Way of carrying out my invention, what I claim,and desire to secure by Letters Patent, is-

l. In a cock or tap, a hollow valve open in one end and in the other endprovided with a small auxiliary valve, said hollow Valve moving on apiston or the like fastened with one end to the Valve-casing and in saidfixed end provided with openings through which the fluid has to How whenthe cock is open, a seat for said valve around the fixed end of saidpiston, and a stem passing through the said piston and connected to thebottom 'of said hollovsr Valve, substantially as and for the purposespeciied.

2. In a cock or tap forliquids a hollow valve open in one end, movingand fitting on a piston which is fastened with one end to theValve-casingand in the xed end provided with openings through which thefluid has to flow when the cock is open, a seat for said valve aroundthe neck of the piston and a stem passing through the said piston andconnected to the bottom of said hollow valve, substantially as and forthe purpose sot forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two witnesses.

ERIK AUGUST BOLINDER. lVitncsses:

AUG. SRENsoN, BERTIL BRANDER.

